少年心亦比薄荷凉姑凉心亦比柠檬酸
[shăo nián xīn yì bĭ bó hé liáng gū liáng xīn yì bĭ níng méng suān]
Translated as 'The boy’s heart is as refreshing as mint; the girl’s heart is as sharp as lemon', expressing the subtle differences in emotional nuances between genders or individuals, comparing them vividly using natural imagery